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un patrat are perimetrul egal cu 5 ,2 dam. aflati in m patrati aria patratului

Răspuns :

P=4l=5.2 dam=>l=1.3 dam=13 m=>A=13^2=169 m^2
P=4l
5,2dam=4l
l=5,2dam:4
l=1,3dam
l=1,3dam*10
l=13m
A=13m^2
A=169m^2
     sau
P=4l
5,2dam=4l
l=5,2dam:4
l=1,3dam
A=1,3dam^2
A=1,69dam^2
A=169m^2